Taming the Beast: Pro-Tips for Designing a Safe Homebrew Laser Cutter
Homebrew laser cutters are nifty devices, but scorching your pals, burning the house down, or smelling up the neighborhood isn’t anyone’s idea of a great time. Lets face it. A 60-watt laser that can cut plastics offers far more trouble than even the crankiest 3D-printers (unless, of course, our 3D printed spaghetti comes to life and decides to terrorize the neighborhood). Sure, a laser’s focused beam is usually pointed in the right direction while cutting, but even an unfocused beam that reflects off a shiny material can start fires. What’s more, since most materials burn, rather than simply melt, a …read more
One Man’s Journey To Build Portable Concrete 3D Printer Produces Its First Tiny House
[Alex Le Roux] want to 3D print houses. Rather than all the trouble we go through now, the contractor would make a foundation, set-up the 3D printer, feed it concrete, and go to lunch.
It’s by no means the first concrete printer we’ve covered, but the progress he’s made is really interesting. It also doesn’t hurt that he’s claimed to make the first livable structure in the United States. We’re not qualified to verify that statement, maybe a reader can help out, but that’s pretty cool!
The printer is a very scaled gantry system. To avoid having an extremely heavy …read more
Reverse Engineering Quadcopter Protocols
Necessity is the mother of invention, but cheap crap from China is the mother of reverse engineering. [Michael] found a very, very cheap toy quadcopter in his local shop, and issued a challenge to himself. He would reverse engineer this quadcopter’s radio protocol. His four-post series of exploits covers finding the right frequency for the radio, figuring out the protocol, and building his own remote for this cheap toy.
[Michael] was already familiar with the capabilities of these cheap toys after reading a Hackaday post, and the 75-page, four language manual cleared a few things up for him. The ‘Quadro-Copter’ …read more
AVR vs PIC, Round 223: Fight!
Get ready to rumble! [Thierry] made the exact same Hello-World-esque project with two microcontrollers (that are now technically produced by the same firm!) to see how the experience went.
It’s not just an LED-blinker, though. He added in a light-detection function so that it only switches on at night. It uses the Forest Mims trick of reverse-biasing the LED and waiting for it to discharge its internal capacitance. The point is, however, that it gives the chip something to do instead of simply sleeping.
Although he’s an AVR user by habit, [Thierry] finds in favor of the PIC because it’s …read more
PinJig Soldering Clamp has Pins Seized by Airport Security
There’s an old adage that when performing a live demo, previously working hacks will mysteriously go awry. In this case, the hardware demo was doomed before it ever arrived at the conference.
PinJig is an interesting take on though-hole soldering. As its name indicates, it’s a jig which holds through-hole components in place as the board is flipped on its side (or even upside down). This is accomplished by 2000 steel pins which are locked in place after being nestled around all of the board’s components. Unfortunately, carrying this prototype onto an international flight didn’t work out. [Niall Barrett] told …read more